python2和python3中文和英文编码问题

a='2017pthton学习'
b=u'2017pthton学习'
print(a.encode('utf-8'))   #b'2017pthton\xe5\xad\xa6\xe4\xb9\xa0'
print(b.encode('utf-8'))   #b'2017pthton\xe5\xad\xa6\xe4\xb9\xa0'
#在python2里面，python编码是以Unicode形式存在，解码时候会出错误
#widows GB2132 编码，linux是 utf-8编码
print(a.decode('gb2312').encode('utf-8')) #就可以解决错误问题

# _*_ coding:utf-8 _*_

import sys
sys.getdefaultencoding('utf8')